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Relative importance of diurnal and nocturnal pollinators for reproduction in the early spring flowering shrub Stachyurus praecox (Stachyuraceae)
Plant Species Biology ( IF 1.1 ) Pub Date : 2020-10-23 , DOI: 10.1111/1442-1984.12299 Daichi Funamoto 1 , Shinji Sugiura 1
Plant Species Biology ( IF 1.1 ) Pub Date : 2020-10-23 , DOI: 10.1111/1442-1984.12299 Daichi Funamoto 1 , Shinji Sugiura 1
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Generalized pollination systems may be favored in early spring flowering plants, as during this period pollinator activity is unpredictable. Many previous studies have concentrated on the importance of diurnal visitors in pollination, and consequently, information on the contribution of nocturnal visitors to pollination in early spring is limited. This study was conducted to evaluate the relative importance of diurnal and nocturnal pollinators in the early spring flowering dioecious shrub Stachyurus praecox (Stachyuraceae), in two temperate forests in central Japan. Visitors to the female and male flowers were observed during day and night, and their relative contributions to seed set were compared. The pollinator observations revealed that the diurnal and nocturnal insects visited both male and female flowers, and that the main flower visitors were diurnal small bees and flies as well as nocturnal settling moths. The diurnal and nocturnal flower visitors also acted as pollinators, as the pollen grains of S. praecox were attached to the insects collected from the female flowers. Pollination experiments demonstrated that the contributions of diurnal pollinators to the seed set were higher than those of the nocturnal pollinators. The results of this study indicate that S. praecox has a generalized pollination system, comprising both diurnal insects and nocturnal settling moths. Although the roles of diurnal insects are more important in the pollination of S. praecox, nocturnal settling moths may have a complementary role in early spring.
中文翻译：
昼夜传粉媒介对早春开花灌木Stachyurus praecox（Stachyuraceae）繁殖的相对重要性
广义授粉系统可能在早春开花植物中受到青睐，因为在此期间授粉媒介的活动是不可预测的。以前的许多研究都集中于昼夜访客在授粉中的重要性，因此，关于夜间访客对早春授粉的贡献的信息有限。这项研究的目的是评估早春开花的雌雄异株灌木Stachyurus praecox中昼夜授粉媒介的相对重要性。（Stachyuraceae），位于日本中部的两个温带森林中。白天和晚上观察到雌花和雄花的访客，并比较它们对结实的相对贡献。传粉者的观察结果表明，昼夜昆虫都访问了雄花和雌花，而主要的访花者是昼夜小蜜蜂和苍蝇以及夜间的定居蛾。白天和夜间的花朵访客也充当传粉者的角色，因为praecox的花粉粒附着在从雌花上采集的昆虫上。授粉实验表明，昼夜授粉对种子结实的贡献高于夜间授粉。这项研究的结果表明，S。praecox有一个广义的授粉系统，包括昼夜昆虫和夜间沉降蛾。尽管昼夜昆虫的作用在S. praecox的授粉中更为重要，但夜间沉降蛾可能在早春起补充作用。
更新日期：2020-10-23
中文翻译：
昼夜传粉媒介对早春开花灌木Stachyurus praecox（Stachyuraceae）繁殖的相对重要性
广义授粉系统可能在早春开花植物中受到青睐，因为在此期间授粉媒介的活动是不可预测的。以前的许多研究都集中于昼夜访客在授粉中的重要性，因此，关于夜间访客对早春授粉的贡献的信息有限。这项研究的目的是评估早春开花的雌雄异株灌木Stachyurus praecox中昼夜授粉媒介的相对重要性。（Stachyuraceae），位于日本中部的两个温带森林中。白天和晚上观察到雌花和雄花的访客，并比较它们对结实的相对贡献。传粉者的观察结果表明，昼夜昆虫都访问了雄花和雌花，而主要的访花者是昼夜小蜜蜂和苍蝇以及夜间的定居蛾。白天和夜间的花朵访客也充当传粉者的角色，因为praecox的花粉粒附着在从雌花上采集的昆虫上。授粉实验表明，昼夜授粉对种子结实的贡献高于夜间授粉。这项研究的结果表明，S。praecox有一个广义的授粉系统，包括昼夜昆虫和夜间沉降蛾。尽管昼夜昆虫的作用在S. praecox的授粉中更为重要，但夜间沉降蛾可能在早春起补充作用。
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